[Botany • 2023] Paraboea zunyiensis (Gesneriaceae) • A New Species from north Guizhou, China

 Paraboea zunyiensis T.Deng, F.Wen & R.B.Zhang, 

in Deng, Wen, Xie, Wei, He, Dou, Qian et Zhang, 2023.

 遵义蛛毛苣苔 | DOI: 10.3897/phytokeys.235.111412

Abstract

A new lithophytic species, Paraboea zunyiensis T.Deng, F.Wen & R.B.Zhang (Gesneriaceae), inhabiting Karst rocks in northern Guizhou, China, is introduced and depicted in this study. It bears a resemblance to P. crassifolia (Hemsl.) B.L. Burtt, yet is distinguishable by its shorter filaments and staminodes, triangular ovate calyx segments, and ovaries surpassing the styles in length. Moreover, the phylogenetic tree constructed from nuclear DNA (ITS) and plastid DNA (trnL-F) data firmly support the differentiation of this novel species from P. crassifolia.

Key words: Flora of Guizhou, lithophyte, new taxon, Paraboea crassifolia, taxonomy

Line drawing of  Paraboea zunyiensis T.Deng, F.Wen & R.B.Zhang, sp. nov.
A flowering plant B corolla C opened corolla D adaxial leaf surface E abaxial leaf surface F calyx G bracts H pistil I capsules J seed K fertile stamens L staminodes.

 Drawings by Tan Deng from the type specimens.

Living or re-watered photographs of Paraboea zunyiensis T.Deng, F.Wen & R.B.Zhang, sp. nov.
A habitat B flowering plant C cyme D flowers E fruiting plant F upward view of the plant G pistil H stigma and style I fertile stamens J staminodes K calyx L bracts M capsules N seeds

(Photographed by T. Deng and R.B. Zhang)

 Paraboea zunyiensis T.Deng, F.Wen & R.B.Zhang, sp. nov.

 

Diagnosis: Paraboea zunyiensis morphologically resembles P. crassifolia, but can be distinguished by the shorter staminodes (< 1 mm vs. 2–2.5 mm in P. crassifolia, following the same order), filaments (ca. 1 mm vs. (3–) 5.5–7 mm) and anthers (1.5–2.3 mm vs. 2.5–3 mm), calyx lobe shape (triangular ovate vs. narrowly triangular to linear), the outer calyx indumentum (tomentose vs. puberulent or velutinous), and the ovary length (ovaries longer than the styles vs. ovaries shorter than the styles).

Etymology: The specific epithet is derived from the type locality, Zunyi City, Guizhou Province, China.

Vernacular name: The Chinese name proposed here is “遵义蛛毛苣苔”. Phonetically, it is “Zūn yì zhū máo jù tái”.

 Tan Deng, Fang Wen, Da-Jun Xie, Ruo-Xun Wei, Lin He, Quan-Li Dou, Zheng-Min Qian and Ren-Bo Zhang. 2023. Paraboea zunyiensis (Gesneriaceae), A New Species from north Guizhou, China. PhytoKeys. 235: 21-29. DOI: 10.3897/phytokeys.235.111412